Download PDF What Every Woman Should Know About Gynecologic Cancer

What Every Woman
Should Know
About Gynecologic
Cancer
R. Kevin Reynolds, MD
The George W. Morley Professor &
Chief, Division of Gyn Oncology
University of Michigan
Ann Arbor, MI
What is gynecologic cancer?
Cancer is a disease where cells grow and spread without control. Gynecologic cancers
begin in the female reproductive organs. The most common gynecologic cancers are
endometrial cancer, ovarian cancer and cervical cancer. Less common gynecologic
cancers involve vulva, Fallopian tube, uterine wall (sarcoma), vagina, and placenta
(pregnancy tissue: molar pregnancy).
Ovary
Uterus
Endometrium
Cervix
Vagina
Vulva
What causes endometrial cancer?
Endometrial cancer is the most common gynecologic cancer: one out of every 40 women
will develop endometrial cancer. It is caused by too much estrogen, a hormone normally
present in women. The most common cause of the excess estrogen is being overweight:
fat cells actually produce estrogen. Another cause of excess estrogen is medication such
as tamoxifen (often prescribed for breast cancer treatment) or some forms of prescribed
estrogen hormone therapy (unopposed estrogen).
How is endometrial cancer detected?
Almost all endometrial cancer is detected when a woman notices vaginal bleeding after
her menopause or irregular bleeding before her menopause. If bleeding occurs, a woman
should contact her doctor so that appropriate testing can be performed. This usually
includes an endometrial biopsy, a brief, slightly crampy test, performed in the office.
Fortunately, most endometrial cancers are detected before spread to other parts of the
body occurs
Is endometrial cancer treatable?
Yes! Most women with endometrial cancer will undergo surgery including hysterectomy
(removal of the uterus) in addition to removal of ovaries and lymph nodes. In most cases,
if biopsies taken at the time of surgery show that the cancer has not spread, no other
treatment is needed. If cancer has spread to other areas, then additional treatment with
radiation is usually needed. Most women with endometrial cancer will be cured if they
receive appropriate treatment.
How is ovarian cancer different from endometrial cancer?
Ovarian cancer is less common than endometrial cancer, but it is a more deadly type of
cancer. More women die from ovarian cancer than all other forms of gynecologic cancer
combined. Unlike endometrial cancer, ovarian cancer is often not detected until it has
already spread to other parts of the body.
Who gets ovarian cancer?
One out of every 60 women will develop ovarian cancer in her lifetime. There are 2
different groups of women who may be at risk for ovarian cancer. The majority of
ovarian cancers develop in women who have many ovulations (egg release from the
ovary) during their lifetime. Bearing children and use of birth control pills both reduce
the likelihood of ovarian cancer because they reduce the number of lifetime ovulations.
About 10% of women who develop ovarian cancer have inherited a gene from either
parent that increases the risk. There are at least 6 genes that can cause inherited ovarian
cancer, including BRCA-1, BRCA-2, MSH, MLH, PMS-1, and PMS-2. Warning signs
that a gene abnormality may be present in a woman’s family include:
™ Multiple family members with breast cancer, ovarian cancer or colon cancer
™ Early age of cancer in affected relatives.
A woman should inform her doctor if she is aware of a family history of cancer, Tests are
available that can detect abnormal genes and if they are detected, prophylactic removal of
the ovaries may greatly reduce the risk of ovarian cancer.
How is ovarian cancer detected?
Warning signs of ovarian cancer include abdominal discomfort, loss of appetite, nausea,
bloating, gas, constipation, and frequent urination, among others. These signs usually do
not occur until the ovarian cancer has already spread. Early ovarian cancer usually does
not cause any symptoms, which is why this is often referred to as a “silent disease”.
There are no reliable tests yet available to detect early ovarian cancer.
Tests that may be very useful in some, but not all, situations include ultrasound (sound
waves that provide a visual image of the ovary) and tumor marker blood tests (CA-125,
CA 19-9, CEA, AFP, and others). None of these tests are perfect, and inappropriate use
of them can actually cause more harm than good. There are a number of new tests in
development including a proteomics test (Ovacheck) and new markers (LPA). It is too
soon to know whether these tests will improve our ability to detect early ovarian cancer.
How is ovarian cancer treated?
Surgery is almost always the first step for treatment. For most women, this will include a
hysterectomy with removal of ovaries, lymph nodes and the omentum (a pad for other
organs in the abdomen). In young women, some types of ovarian cancer can be treated
with less aggressive surgery to preserve fertility.
Following surgery, the exact type of ovarian cancer and the extent of spread (stage), if
any, are determined. Some early ovarian cancers require only surgery for treatment. The
majority of women with ovarian cancer will need chemotherapy, which is medication
designed to kill cancer cells in order to reduce the risk of the cancer recurring.
Is ovarian cancer curable?
With modern surgical techniques and chemotherapy, ovarian cancer without spread at the
time of diagnosis can be “cured” in up to 95% of women. Unfortunately, at least 70% of
ovarian cancers are detected after spread has occurred. For these women, treatment has
an 80% chance of “remission”, meaning disappearance or shrinkage of disease. Disease
of this advanced extent has a high likelihood of relapse, anywhere from months to years
after treatment. We can often successfully treat relapses and attain another remission, but
we are not able to permanently “cure” ovarian cancer that has relapsed.
What is being done to improve ovarian cancer treatment?
Clinical trials allow experimental treatments to be attempted in controlled settings to
protect the safety of patients. Research centers nationwide are developing new treatments
including:
™ Immunotherapy (Ovarex, vaccines)
™ Gene therapy
™ Biological therapy
™ New chemotherapy treatment
It takes a great deal of time to improve treatment of ovarian cancer, but progress is being
made.
Quality of life for women with ovarian cancer is improving. Chemotherapy no longer
causes severe nausea, vomiting or exhaustion.
What is cervical cancer?
Cervical cancer involves the lowermost portion of the uterus where it enters the vagina.
Cervical cancer was once the most common gynecologic cancer in the world. Use of the
Pap test has greatly reduced cervical cancer by allowing detection of abnormalities that
can be treated before the cancer develops.
How often should Pap tests be done?
Pap tests should begin within 3 years of the time that a woman becomes sexually active
or by 21 at the latest. The test should be done every year (conventional method) or two
rears (liquid method: ThinPrep) until age 30. If all tests are normal by age 30, Pap tests
can be every 2-3 years depending on which method your doctor uses.
What if a Pap test is abnormal?
If an abnormal Pap test occurs, additional testing with colposcopy (a microscope to view
the cervix) is performed in the office. Pre-cancer conditions can usually be treated by
removing the portion of diseased skin on the cervix.
Most cervical cancers are detected early as long as a woman has Pap tests regularly. Early
cervical cancer is very treatable and the cure rate is high. New surgical techniques allow
early cervical cancer to be treated with preservation of fertility. More advanced cases
require radical surgery or radiation therapy.
What causes cervical cancer?
Cervical cancer is caused by the human papilloma virus (HPV) which is a sexually
transmitted disease that also causes genital warts. Smoking is strongly associated with
cervical cancer.
How can HPV infection be prevented?
HPV is a sexually transmitted disease. Safe sex practices including monogamous
relationships, fewer sexual partners and use of condoms help to reduce risk. A vaccine to
prevent transmission of the virus is available for females from age 9-26
If a woman has a gynecologic cancer, what should she do and where should she go?
Medical studies have shown that the quality of care and chances of survival are best when
a cancer specialist provides care. Specialists in gynecologic cancer are
GYNECOLOGIC ONCOLOGISTS. It is best to ask for referral to a gynecologic
oncologist if cancer is diagnosed or suspected.
Resources
University of Michigan
Department of ObGyn
Appointments
American Cancer Society
Women’s Cancer Network
National Institutes of Health
Society of Gynecologic Oncologists
www.med.umich.edu/obgyn/gynonc/more.htm
734-647-8906
www.cancer.org
www.wcn.org
(locate a gyn oncologist)
www.nci.nih.gov (listing of clinical trials)
www.sgo.org